Why was the word "Emperor" or "Empress" not used as much in British/European Monarchies despite the British/various European Empires? EG: King George III declined to use "Emperor of the British Isles", preferring instead "The United Kingdom of Great Britain and Ireland." Why?
There are several old but enlightening comments from /u/WhenTheRvlutionComes, /u/intangible-tangerine, and /u/SheldonNovick in this thread here, but there is always room for further discussion.